topic Re: shadow mask based on shaded relief in IMAGINE Discussionshttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30203#M2631
<P>Thank you for the replay, i'll try to use the operator mentionned. In fact, i'm not worker but phd student.</P>Tue, 12 Feb 2019 13:46:58 GMTmimi2019-02-12T13:46:58Zshadow mask based on shaded reliefhttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30196#M2627
<P>&nbsp;</P><P><SPAN>I want to use shaded relief functionality in Erdas to create a shadow mask for my image. i create a shaded relief raster image from a DEM and my image but idon't know how to pass to the mask. Can any one here tell me hwo can i do that?</SPAN></P>Tue, 12 Feb 2019 11:51:40 GMThttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30196#M2627mimi2019-02-12T11:51:40ZRe: shadow mask based on shaded reliefhttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30198#M2628
<P>Hi again!</P><P>&nbsp;</P><P>The attached model should do what you want - as long as you're using version 2018. You might want to look at using the insolation operator instead - might give better results for you.</P><P>&nbsp;</P><P>Cheers,</P><P>&nbsp;</P><P>Johnnie</P>Tue, 12 Feb 2019 12:39:19 GMThttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30198#M2628JohnnieJ2019-02-12T12:39:19ZRe: shadow mask based on shaded reliefhttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30199#M2629
<P>Hi,</P><P>&nbsp;</P><P>Thank you for the replay. Actually i'm working on Erdas 2014, and i can't open the model file you send me.</P><P>The shaded relief function gave me a raster file with one layer. based on thersholds, i have got a good delimitaion to shadows in my original image. All i want is to find a way to create a vector to mask shadows in my original image. i'm new with erdas. Is there any simple way to do what this?</P>Tue, 12 Feb 2019 13:17:21 GMThttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30199#M2629mimi2019-02-12T13:17:21ZRe: shadow mask based on shaded reliefhttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30201#M2630
<P>Why create a vector? Just use the shadow pixels to mask out the shadow location. Use the Either/Or operator to apply a mask:</P>
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<P><IMG src="https://community.hexagongeospatial.com/t5/image/serverpage/image-id/5543i33AED2A2A845D379/image-size/original?v=1.0&amp;px=-1" border="0" alt="Mask.PNG" title="Mask.PNG" /></P>
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<P>I also strongly&nbsp;recommend upgrading to ERDAS IMAGINE 2018 - as Johnnie says, there's significant new functionality including the much more rigorous <A href="https://hexagongeospatial.fluidtopics.net/reader/XWswM6TZr3V__hu3iKjbGA/CU~6us0aA62S4JuOFa6Qaw" target="_self">Analyze Radiance</A> operator for generating a shadow mask. Newer versions also have the Apply Mask operator</P>
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<P><IMG src="https://community.hexagongeospatial.com/t5/image/serverpage/image-id/5544iF5D4B8C2559D09B3/image-size/original?v=1.0&amp;px=-1" border="0" alt="Mask2.PNG" title="Mask2.PNG" /></P>
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<P>What company do you work for? I can get someone to contact them and get your&nbsp;software upgraded.&nbsp;</P>
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<P>Cheers</P>
<P>&nbsp;</P>Tue, 12 Feb 2019 13:41:18 GMThttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30201#M2630ian.anderson2019-02-12T13:41:18ZRe: shadow mask based on shaded reliefhttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30203#M2631
<P>Thank you for the replay, i'll try to use the operator mentionned. In fact, i'm not worker but phd student.</P>Tue, 12 Feb 2019 13:46:58 GMThttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30203#M2631mimi2019-02-12T13:46:58ZRe: shadow mask based on shaded reliefhttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30204#M2632
<P>Hi Mimi,</P>
<P>&nbsp;</P>
<P>If you look on the <STRONG>Raster</STRONG> tab &gt; <STRONG>Geometry</STRONG> group &gt; <STRONG>Subset &amp; Chip</STRONG> pulldown there's a <A href="https://hexagongeospatial.fluidtopics.net/reader/XWswM6TZr3V__hu3iKjbGA/0OY0daxLe19doIo5FRP_Jg" target="_self">Mask </A>utility&nbsp;you could use instead&nbsp;if you wanted.</P>
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<P>Good luck with the PhD. Which University&nbsp;is it? The University program&nbsp;usually keeps educational institutes up to date on software versions.</P>
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<P>Cheers</P>
<P>&nbsp;</P>Tue, 12 Feb 2019 13:54:54 GMThttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30204#M2632ian.anderson2019-02-12T13:54:54ZRe: shadow mask based on shaded reliefhttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30212#M2633
<P>Hi,</P><P>Thank you for this second trick, it seems mor affordable.</P><P>I'm in Blida university, it is in Algeria and unfortunality, our university doesn't provide such material.</P><P>&nbsp;</P>Tue, 12 Feb 2019 22:14:31 GMThttps://community.hexagongeospatial.com/t5/IMAGINE-Discussions/shadow-mask-based-on-shaded-relief/m-p/30212#M2633mimi2019-02-12T22:14:31Z